Firing mechanism for hunting fire arm with two barrels

ABSTRACT

A firing mechanism for a hunting gun having two barrels includes a change-over device connected with the trigger, so that the user can select which of the two barrels shall be fired first. A laterally movable pendulum prevents double firing. It is connected with a change-over stud which can move it laterally and which is located inside the trigger. A change-over lever is carried by the same shaft as the trigger. A single spring presses the catch of the pendulum and the catch of the change-over lever against each other to return the trigger into its starting position and move the pendulum for release of the other sear.

flied States atent 1 Vesamaa Sept. 11, 1973 FIRING MECHANISM FOR HUNTING FIRE ARM WITH TWO BARRELS ['75] Inventor: Erkki Vesamaa, Jyvaskyla, Finland [73] Assignee: Valment 0y, Helsinki; Finland [22] Filed: Mar. 15, 1971 l2l] Appl. No.: 124,248

Primary Examiner-Benjamin A. Borchelt Assistant Examiner-C. T. Jordan Att0rneyRichards & Geier 57 ABSTRACT A firing mechanism for a hunting gun having two barrels includes a change-over device connected with the trigger, so that the user can select which of the two barrels shall be fired first. A laterally movable pendulum prevents double firing. It is connected with a changeover stud which can move it laterally and which is located inside the trigger. A change-over lever is carried by the same shaft as the trigger. A single spring presses the catch of the pendulum and the catch of the changeover lever against each other to return the trigger into its starting position and move the pendulum for release of the other sear.

1 Claim, 5 Drawing Figures PATENTED SEP I I i975 SHEET-1 0F 2 INVEN TQ R PATENTED SEPY I975 IN V EwTovb FIRING MECHANISM FOR HUNTING FIRE ARM WITH TWO BARRELS The present invention concerns a firing mechanism for a hunting fire arm with two barrels. The mechanism comprises a trigger, into which a change-over device has been fitted by means of which the barrel of the twobarreled fire arm can be selected which shall be fired first. The change-over device is composed of a pendulum, preventing double firing, which is laterally displaceable by the aid of a change-over stud fitted in connection with the trigger. The pendulum has been journalled on the change-over stud and it has furthermore a catch, which in association with a catch of the change-over lever determines the lateral position of the pendulum. The change-over lever and trigger have been journalled on a common shaft, in connection with which a spring common to the trigger and to the change-over mechanism has been arranged.

In equivalent firing mechanisms belonging to prior art the trigger and change-over lever have been journailed on a separate shaft outside the trigger. Thereby separate springs have been required both for returning the trigger from the firing position to the starting position and for the pendulum and change-over lever.

The aim of the invention is to combine the trigger and the change-over device with its pendulum so that in the entire mechanism ony one spring is needed, in order to achieve a firing mechanism which is simple, reliable in operation and requires little space.

The invention is mainly characterized in that the pendulum preventing double firing and releasing the firing sear has been carried on the change-over stud, placed in the trigger, which displaces it laterally and by means of which that barrel is selected which shall be fired first. Furthermore, the invention is characterized in that the trigger and the change-over lever placed inside the same are carried on the same shaft, so that one and the same spring by pressing the catch of the pendulum and the catch of the change-over lever against each other ensures the lateral position of the pendulum and returns the trigger from the firing position to the starting position, and returns thependulum after the firing motion into its anterior position for release of the other sear.

The invention is described in greater detail in the following with reference to the embodiment example presented in the attached drawing, however, without any prejudice as regards the scope of the invention.

FIG. 1 shows the firing mechanism in cocked position and ready for firing so that the change-over stud has been pushed to the right as seen from behind the fire arm and whereby thus the hammer on the right side may be first released.

FIG. 2 shows the situation of FIG. I, immediately after firing.

FIG. 3 shows the situation of the preceding figures, a short moment after firing, when the trigger has been allowed to return to its starting position and the pendulum has swung into its rear position, thereby preventing double firing.

FIG. 4 shows the section along line IV IV in FIG. 3.

FIG. 5 shows the same section as FIG. 4, with the change-over device in the opposite position.

When the firing mechanism is in the action position of FIG. I, the spring 3 urges the catch 2 of the changeover lever 1 against the catch 5 of the pendulum 4 journalled in a groove provided in the change-over stud 6. Therefore the spring 3 also urges the trigger 9 into its starting position by the action of the change-over lever l and the catches 2 and 5 and the change-over stud 6. In the same situation the spring 3 also urges the pendulum 4 into its anterior position, whereby the triggering step 10 rests against the end of the sear 8 and the mechanism is primed for firing.

As can be seen from the foregoing, the spring 3 takes care of three different tasks, which previously have been managed by means of separate springs. This has been achieved by carrying the change-over lever and trigger on the same shaft and by placing the changeover device with its spring inside the flange.

When the trigger 9 is pulled backwardly, the triggering step It) raises the end of the sear 8, and the respective hammer is released. In FIG. 2 this situation has been shown, in which the spring 3 has been compressed, urging the trigger towards its starting position. In FIG. 3 the pendulum 4 is in its rear position, owing to recoil and releasing of the trigger 9. The pendulum 4 is returned to its anterior position also by the spring 3, by the use of the catch 2 of change-over lever 1 and the catch 5 of the pendulum, whereby the other sear can now be released by action of another step beside the triggering step 10.

The operation of the change-over device is apparent in greater detail from FIGS. 4 and 5. As has been said, the pendulum 4 is carried in a groove made in the change-over stud, which has been placed inside the trigger. The catch 2 of the change-over lever inside the triggervcannot move laterally, whereas the pendulum and its integral catch 5 can be displaced sidewise by pressing the change-over stud 6. When the change-over stud 6 is pushed from the position of FIG. 4 to the left into that of FIG. 5, the change-over catch 2 yields elastically upward against the force of the spring 3 and the catch of the pendulum can move over to the other side of the change-over catch 2; this stable position is maintained by the spring 3. The pendulum 4, which is laterally bound to the change-over stud, has then moved under the left sear, as viewed from behind, and it is now possible to release first the left and only then the right sear.

I claim:

I. In a firing mechanism for a hunting arm having two barrels, a sear and a trigger, a change-over device for selecting which barrel shall be fired first, comprising a pendulum having a catch, a change-over stud carrying said pendulum, said change-over stud being located inside the trigger and displacing said pendulum laterally, a change-over lever having a catch, said lever being located inside the trigger, a single shaft carrying the trigger and said change-over lever, and a single spring urging the catch of the pendulum and the catch of said change-over lever against each other, whereby said spring ensures the lateral position of the pendulum, returns the trigger from the firing position into the starting position and moves the pendulum after its firing motion into an anterior position for release of a scar. B 1* =0 II! UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Dated September 1 1913 Patent No. 2 77QL6 Inventor(s) .Erkki V6 samaa It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the cover sheet, in the heading, itemEYSj \h'ilrnent 0y should read Valmet 0y On the cover sheet, in the heading, insert 5 [30] Foreign Application Priority: Finland March 16, 1970 Signed and sealed this 7th day of May 197% SEAL Attest:

EDWARD M .FLETCHER, JR C MAR SHALL DANN Atte sting Officer Commissioner of Patents USCOMM-DC 60376-P69. w u.s. sovinuuzn-r mm'me omcs an o-ss-au FORM PO-iOSO (10-69) UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. z 'zrwju Dated September 1] 1913 Inventor(5) Erlcki Vesamaa It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the cover sheet, in the heading, itemEiBj "Valment Oy" should Peed Valmet 0y On the cover sheet, in the heading, insert J-a [30] Foreign Application Priority: Finland March 16, 1970 Signed and sealed this 7th day of May 1971;.

(SEAL) Attest:

EDWARD PLFLETCHER, JR. 0. MARSHALL DANN Atte sting Officer Commissioner of Patents FORM P0-105O (10 69) USCOMM-DC 60376-P69. w u,s. aovtmuazm' rmmme OFFICE I!" o-ads-su, 

1. In a firing mechanism for a hunting arm having two barrels, a sear and a trigger, a change-over device for selecting which barrel shall be fired first, comprising a pendulum having a catch, a change-over stud carrying said pendulum, said changeover stud being located inside the trigger and displacing said pendulum laterally, a change-over lever having a catch, said lever being located inside the trigger, a single shaft carrying the trigger and said change-over lever, and a single spring urging the catch of the pendulum and the catch of said changeover lever against each other, whereby said spring ensures the lateral position of the pendulum, returns the trigger from the firing position into the starting position and moves the pendulum after its firing motion into an anterior position for release of a sear. 